JP3557165B2 - Light source device and projection type video display device having the same - Google Patents

Light source device and projection type video display device having the same Download PDF

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Publication number
JP3557165B2
JP3557165B2 JP2000342582A JP2000342582A JP3557165B2 JP 3557165 B2 JP3557165 B2 JP 3557165B2 JP 2000342582 A JP2000342582 A JP 2000342582A JP 2000342582 A JP2000342582 A JP 2000342582A JP 3557165 B2 JP3557165 B2 JP 3557165B2
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Prior art keywords
light source
source device
reflecting mirror
light
curved reflecting
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JP2002150831A (en
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宏充 義之
弘一 藤原
隆夫 松村
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Sanyo Electric Co Ltd
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Sanyo Electric Co Ltd
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  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Projection Apparatus (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Description

【0001】
【産業上の利用分野】
この発明は、光源装置および投写型映像表示装置に関する。
【0002】
【従来の技術】
液晶プロジェクタなどの投写型映像表示装置には、高輝度の光源装置が設けられている。この光源装置は発光部と曲面反射鏡(放物面反射鏡や楕円反射鏡)とから成り、前記発光部には、発光効率の観点などからメタルハライドランプに代表される放電管が使用されている。放電管は、その構造上、点灯中に破裂する可能性があるため、その対策として、図5に示すように、放物面反射鏡50の前縁に当接して固定されることによって放電管51の前方を覆う透明な保護板52を設けた構造が採用されており、点灯中に放電管51が破裂しても、その破片が周囲に飛び散らないようにしている。また、図6に示すように、放電管51を透明ガラス管53で覆った2重管構造も知られている。
【0003】
【発明が解決しようとする課題】
しかしながら、上記従来の光源装置は、放電管51を完全に覆う構造であるため、放電管51から発せられた熱がこもり、温度が上昇して高温になり易い。また、特に図6に示した2重管構造の光源装置は割高であり、製作歩留りも悪いといった欠点を有している。
【0004】
この発明は、上記の事情に鑑み、発光部の破裂による破片飛び散りを防止しつつ過度な温度上昇を防止できる光源装置及びこれを用いた投写型映像表示装置を提供することを目的とする。
【0005】
【課題を解決するための手段】
この発明の光源装置は、上記の課題を解決するために、発光部と、前記発光部から出射された光を反射する曲面反射鏡と、前記曲面反射鏡の開口側を覆うように設けられた透明保護板とを備えた光源装置において、前記曲面反射鏡の前縁近傍に切欠が形成され、複数の通気貫通孔を有して前記切欠を覆うように設けられた平板部材と、L字状板の一方の板面に前記曲面反射鏡からの出射光を透過させるための開口を有した支持台と、前記支持台の他方の板面に設けられた一対の係止穴部と、前記支持台の一方の板面に設けられた係止爪部と、前記一対の係止穴部に係合し且つ前記係止爪部にて係止されることで前記曲面反射鏡を支持台に固定すると共に前記平板部材を前記曲面反射鏡に圧接する線状弾性部材と、を備えたことを特徴とする。
【0010】
上記の構成によれば、通気貫通孔によって光源装置内の高温空気は光源装置外の低温空気と入れ替わることが可能となり、光源装置の過度な温度上昇を抑えることができる。また通気貫通孔の大きさや個数などを違えた複数種類の平板部材を用意することが容易であり、曲面反射鏡としては共通品を用いつつ、冷却ファンの能力等を考慮して適宜平板部材を選択することで、発光部における最良の発光状態を簡単に実現させることが可能となる。また、ねじや接着剤などを用いずに曲面反射鏡を支持台に固定できると共に平板部材を曲面反射鏡に圧接できるので、特に平板部材が曲面反射鏡に係合装着される形態においては平板部材の離脱を確実に防止することが可能である。
【0011】
また、この発明の投写型映像表示装置は、上述した光源装置と、該光源装置から出射された光をライトバルブに導く光学系と、前記ライトバルブを経た光を投写する投写レンズと、前記光源装置の近傍に設けられた冷却ファン装置と、を備えたことを特徴とする。
【0012】
【発明の実施の形態】
以下、この発明の実施形態の液晶プロジェクタを図1乃至図3に基づいて説明する。
【0013】
図1はこの実施形態の液晶プロジェクタ1における内部構造の概略を示した断面図である。図では一つの液晶パネル2を備える一板式として示しているが、赤色光(R)用の液晶パネル、緑色光(G)用の液晶パネル、及び青色光(B)用の液晶パネルを備えた三板式の構成としてもよい。三板式の構成とする場合にはダイクロイックミラー、リレーレンズ、ダイクロイックプリズム等を用いた光学系を採用することができる。また、光源装置3を一つ備える構成としているが、複数備える構成としてもよい。
【0014】
液晶プロジェクタ1の筐体1aの前面側には投写レンズ4が設けられている。光源装置3から出射された光は透過型の液晶パネル2にて光変調され、図示しない光学系を経て前記投写レンズ4に導かれ、この投写レンズ4にて図示しないスクリーンに映像が投影される。また、筐体1aの背面側には通気穴1bが形成されており、この通気穴1bに面した位置で且つ光源装置3の近傍位置に冷却ファン5を設けている。
【0015】
図2は光源装置3を拡大して示した説明図である。光源装置3は、メタルハライドランプ等の放電管から成る発光部11と、この発光部11から出射された光が平行光となるように反射する放物面反射鏡12と、この放物面反射鏡の前縁に接してこれを覆うように設けられた透明保護板13とを備え成る。そして、前記放物面反射鏡12は、その名の如く放物線を回転させて得られる形状を有するのであるが、液晶パネル2は方形状に形成されており、必要な光照射面形状は方形状でよいため、放物面反射鏡12の前縁近傍箇所において、液晶パネル2の方形状に対応させて平坦面部12aを4か所形成している。そして、この平坦面部12aの一つにおいて複数の通気貫通孔12bを形成している。
【0016】
上記の通気貫通孔12bによって光源装置3内の高温空気は光源装置3外の低温空気と入れ替わることが可能になり、光源装置3の温度上昇を抑えることができる。また、複数の通気貫通孔12bを備えるので、一つ一つの通気貫通孔を適当な小ささのものとし、万が一発光部11が破裂した際の破裂片の飛び散りを防止している。実験では、通気と破裂片の飛び散り防止の観点から、通気貫通孔12bの直径を1.5mm〜2.0mm程度とするのが適当であった。また、通気貫通孔12bは放物面反射鏡12における平坦面部12aに形成されているので、光反射の主要領域に及んで散在させて設けた場合の光反射効率低下といった不具合も防止できる。
【0017】
図3及び図4は光源装置の他の例を示した斜視図である。この光源装置6は、メタルハライドランプ等の放電管から成る発光部21と、この発光部21から出射された光が平行光となるように反射する放物面反射鏡22と、この放物面反射鏡の前縁に接してこれを覆うように設けられた透明保護板23とを備える。放物面反射鏡22は、その前縁近傍に平坦面部を4か所有し、この平坦面部の一つ(図では右箇所)において切欠22aを有している。この切欠22aは、複数の通気貫通孔24aが形成された飛散防止板(この実施形態では金属製としている)24によって覆われている。飛散防止板24を接着剤等によって放物面反射鏡22に装着してもよいのであるが、この実施形態では以下のようにして飛散防止板24を放物面反射鏡22に装着している。
【0018】
飛散防止板24は前記通気貫通孔24aが形成された本体部と当該本体部から上下方向に各々延びた腕部とを有して成り、各腕部の先端を屈曲させて係止突起24bを形成している。一方、放物面反射鏡22の前縁上端および前縁下端には係止凹部22bが形成されている。係止凹部22bに係止突起24bが係合することで、飛散防止板24が放物面反射鏡22に係合装着される。
【0019】
L字状板から成る支持台25は、一方の板面(立上板面)に放物面反射鏡22からの出射光を透過させるための開口25aを有する。支持台25の他方の板面には、一対の係止穴部26が放物面反射鏡22の横幅に略対応した間隔をおいて設けられている。また、支持台25の一方の板面(立上板面)の上部位置(開口25aよりも上の位置)には、係止爪部27が設けられている。係止爪部27は、他方の板面の側へ当該板面と略平行に突出して形成されており、その先端の下面側に爪部を有している。なお、この実施形態では、支持台25と一対の係止穴部26と係止爪部27とは樹脂成形によって一体成形されている。
【0020】
係止爪部27は、線状弾性部材28を係止するように位置しているものであるが、線状弾性部材28における弾性力を受け止めるのではなく、当該弾性力は放物面反射鏡22に加わるようにしてある。放物面反射鏡22は前縁側ほど大径となるものであり、線状弾性部材28の弾性力が放物面反射鏡22に加わる状態では線状弾性部材28は小径側へとずれ動こうとするが、このずれ動きを係止爪部27が阻止する。線状弾性部材28は、放物面反射鏡22の周囲形状に略対応した略Ω字形状を成しており、端部には前記一対の係止穴部26に係合することになる屈曲部28aを有している。この線状弾性部材28の屈曲部28aを係止穴部26にそれぞれ係合させ、線状弾性部材28の中央上部を前記係止爪部27に係止させることにより、放物面反射鏡22に下方向の弾性力が加わる。放物面反射鏡22は前縁側ほど大径となるものであるから、上記下方向の弾性力を受けることで、放物面反射鏡22を支持台25の一方の板面(立上板面)に圧接する力が生じるとともに、放物面反射鏡22を支持台25の他方の板面に圧接する力が生じることになる。これらの力によって放物面反射鏡22が支持台25に固定されることになる。
【0021】
また、放物面反射鏡22における左右のずれ動きも略Ω字形状を成す線状弾性部材28によって阻止されることになる。線状弾性部材28には出っ張り部28bが形成されており、この出っ張り部28bが飛散防止板24上を通るようにしてある。従って、飛散防止板24が放物面反射鏡22の平坦面部に設けられていても、線状弾性部材28の弾性力が飛散防止板24に確実に付与され、飛散防止板24は放物面反射鏡22に押圧された状態でしっかりと保持されることになる。
【0022】
このように、図3及び図4に示した構成は、通気貫通孔24aを有する飛散防止板24を用いるから、図2に示した放物面反射鏡12自体に通気貫通孔12bを形成する場合の技術的困難性を解決しつつ、図2の構成において奏する作用を同様に発揮することが可能となる。
【0023】
ここで、発光部21(11)において最良の発光状態を得るには、発光部21(11)が最適な温度に維持されることが必要であり、冷却不足や過剰な冷却は避けるべきであるが、各機種で用いられる発光部21(11)や冷却ファン5の能力や部材配置による冷却空気の流路などが相違しており、各機種において最適な通気貫通孔24a(12b)の大きさや個数や配置なども違ってくることになる。通気貫通孔24aを有する飛散防止板24を用いる構成においては、通気貫通孔24aの個数や大きさ(孔の大きさの最大値は破片飛び散り防止の観点から決定するのが望ましい)や配置などを違えた複数種類の飛散防止板24を用意しておき、放物面反射鏡22については共通品を用いつつ、前記冷却ファン5の能力等を考慮して、適宜飛散防止板24を選択することで、発光部21における最良の発光状態を簡単に実現させることが可能となる。
【0024】
また、放物面反射鏡22に係止凹部22bを形成してこれに飛散防止板24の係止突起24bを係合させるようにしたから、ねじや接着剤などを用いずに飛散防止板24を放物面反射鏡22に装着することができる。また、光源装置の交換においては飛散防止板24を再利用することが可能となる。勿論、係止凹部22bと係止突起24bとによる係合に限らず、係止凹部22bに代えて係止凸部とするなど、他の構成を採用することができる。また、放物面反射鏡22の切欠22aを飛散防止板24で覆うことを実現することにおいては、飛散防止板24を放物面反射鏡22に装着することの他、例えば、飛散防止板24を支持台25に取り付け、放物面反射鏡22を支持台25に装着することで切欠22aが飛散防止板24で覆われるとする構成も採用し得る。
【0025】
また、線状弾性部材28によって放物面反射鏡22を支持台25に固定するようにしたから、固定用のねじや接着剤などを不要にできるとともに、線状弾性部材28の弾性力によって飛散防止板24が放物面反射鏡22から離脱してしまうのを確実に防止することができる。特に、線状弾性部材28に出っ張り部28bを設けたことで、放物面反射鏡22の平坦面部に設けた飛散防止板24を確実に押さえつけることができる。
【0026】
なお、以上の説明においては、曲面反射鏡として放物面反射鏡12(22)を例示したが、楕円反射鏡としてもよい。また、飛散防止板24は金属に限らず、耐熱性の樹脂等を用いることができる。また、飛散防止板24を放物面反射鏡22の右横部に装着したが、切欠22aが左横部に存在する場合には当然に左横部に装着してもよく、両横部に切欠22aが存在する場合には、右横部或いは左横部の一方のみに装着して他方は完全に塞ぐようにしてもよいし、或いは両方に装着してもよい。また、切欠22aが上部に存在する場合には当然に上部に装着してもよい。また、切欠22aや通気貫通孔12bは放物面反射鏡22・12の平坦面部において形成し、光反射効率の低下を極力防止するようにしたが、必ずしも平坦面部に形成することに限定するものではない。また、通気貫通孔の形状を円形としたが、角形など他の形状としてもよい。また、透明保護板23を放物面反射鏡22に装着したが、透明保護板23を支持台25に装着する構造も採用し得る。また、当該光源装置を液晶プロジェクタに用いたが、他のライトバルブを用いる投写型映像表示装置にも用いることができる。
【0027】
【発明の効果】
以上説明したように、この発明によれば、通気貫通孔によって光源装置内の高温空気を光源装置外の低温空気と入れ替え、光源装置の温度上昇を抑えることができる。また、複数の通気貫通孔を備えるので、一つ一つの通気貫通孔を適当な小ささのものとし、万が一発光部が破裂した際の破裂片の飛び散りを防止することができる。
【0028】
曲面反射鏡に形成した切欠を複数の通気貫通孔を有する平板部材にて覆う構成であれば、曲面反射鏡自体に複数の通気貫通孔を形成する場合の技術的困難性を解決することができる。また、平板部材に形成する通気貫通孔の数や大きさ等を変えることで発光部に対する冷却能力を調整でき、発光部において最良の温度を確保することが可能となる。
【0029】
平板部材を曲面反射鏡に係合装着する構成であれば、ねじや接着剤などを用いずに平板部材を曲面反射鏡に装着することができる。また、光源装置の交換においては平板部材を再利用することが可能となる。
【0030】
線状弾性部材を用いて曲面反射鏡に支持台に装着する構成であれば、ねじや接着剤などを用いずに曲面反射鏡を支持台に固定できると共に平板部材は曲面反射鏡に圧接されるので、特に平板部材が曲面反射鏡に係合装着される形態においては平板部材の離脱を確実に防止することが可能となる。
【図面の簡単な説明】
【図1】この発明の実施形態の液晶プロジェクタの概略構成を示した断面図である。
【図2】図1に示した光源装置の拡大図である。
【図3】この発明の実施形態の光源装置の斜視図である。
【図4】この発明の実施形態の光源装置の分解斜視図である。
【図5】従来の光源装置を示した断面図である。
【図6】従来の光源装置(2重管構造)を示した断面図である。
【符号の説明】
1 液晶プロジェクタ
2 液晶パネル
3 光源装置
4 投写レンズ
5 冷却ファン装置
11,21 発光部
12,22 放物面反射鏡
13,23 透明保護板
12b,24a 通気貫通孔
24a通気貫通孔
25 支持台
26 係止穴部
27 係止爪部
28 線状弾性部材
[0001]
[Industrial applications]
The present invention relates to a light source device and a projection type video display device.
[0002]
[Prior art]
A projection-type image display device such as a liquid crystal projector is provided with a high-luminance light source device. This light source device includes a light emitting section and a curved reflecting mirror (a parabolic reflecting mirror or an elliptical reflecting mirror). In the light emitting section, a discharge tube typified by a metal halide lamp is used from the viewpoint of luminous efficiency. . Since the discharge tube may rupture during lighting due to its structure, as a countermeasure, as shown in FIG. 5, the discharge tube is fixed by contacting the front edge of the parabolic reflector 50. A structure in which a transparent protective plate 52 is provided to cover the front of the discharge tube 51 is employed so that even if the discharge tube 51 ruptures during lighting, the fragments do not scatter around. Further, as shown in FIG. 6, a double tube structure in which a discharge tube 51 is covered with a transparent glass tube 53 is also known.
[0003]
[Problems to be solved by the invention]
However, since the above-mentioned conventional light source device has a structure that completely covers the discharge tube 51, the heat generated from the discharge tube 51 is trapped, and the temperature easily rises to a high temperature. In addition, the light source device having a double tube structure shown in FIG. 6 is disadvantageous in that it is expensive and the production yield is poor.
[0004]
The present invention has been made in view of the above circumstances, and has as its object to provide a light source device capable of preventing an excessive rise in temperature while preventing fragments from being scattered due to a rupture of a light emitting unit, and a projection type image display device using the same.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, a light source device of the present invention is provided so as to cover a light emitting unit, a curved reflecting mirror for reflecting light emitted from the light emitting unit, and an opening side of the curved reflecting mirror. A light source device comprising a transparent protective plate, a notch formed near a front edge of the curved reflecting mirror, a flat plate member having a plurality of ventilation through holes provided to cover the notch, and an L-shaped member. A support having an opening on one plate surface of the plate for transmitting light emitted from the curved reflecting mirror, a pair of locking holes provided on the other plate surface of the support, The curved reflecting mirror is fixed to the support table by engaging with a locking claw provided on one plate surface of the base and the pair of locking holes and being locked by the locking claw. And a linear elastic member for pressing the flat plate member against the curved reflecting mirror.
[0010]
According to the above configuration, the high-temperature air inside the light source device can be replaced with the low-temperature air outside the light source device by the ventilation through-hole, so that an excessive rise in temperature of the light source device can be suppressed. In addition, it is easy to prepare a plurality of types of flat plate members having different sizes and numbers of ventilation through holes, and a common flat mirror member is used. By making a selection, the best light emitting state in the light emitting section can be easily realized. Further, since the curved reflecting mirror can be fixed to the support base without using a screw or an adhesive, and the flat plate member can be pressed against the curved reflecting mirror, the flat plate member is particularly fitted to the curved reflecting mirror. Can be reliably prevented from being detached.
[0011]
In addition, the projection display apparatus of the present invention includes the light source device described above, an optical system that guides light emitted from the light source device to a light valve, a projection lens that projects light that has passed through the light valve, and the light source. And a cooling fan device provided in the vicinity of the device.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a liquid crystal projector according to an embodiment of the present invention will be described with reference to FIGS.
[0013]
FIG. 1 is a sectional view schematically showing the internal structure of a liquid crystal projector 1 according to this embodiment. Although shown as a single-panel type having one liquid crystal panel 2 in the figure, a liquid crystal panel for red light (R), a liquid crystal panel for green light (G), and a liquid crystal panel for blue light (B) are provided. A three-plate configuration may be used. In the case of a three-plate configuration, an optical system using a dichroic mirror, a relay lens, a dichroic prism, or the like can be employed. Further, the light source device 3 is provided with one, but may be provided with a plurality.
[0014]
A projection lens 4 is provided on the front side of the housing 1a of the liquid crystal projector 1. The light emitted from the light source device 3 is light-modulated by the transmission type liquid crystal panel 2, guided to the projection lens 4 via an optical system (not shown), and an image is projected on a screen (not shown) by the projection lens 4. . Further, a ventilation hole 1b is formed on the back side of the housing 1a, and a cooling fan 5 is provided at a position facing the ventilation hole 1b and near the light source device 3.
[0015]
FIG. 2 is an explanatory diagram showing the light source device 3 in an enlarged manner. The light source device 3 includes a light emitting unit 11 formed of a discharge tube such as a metal halide lamp, a parabolic reflector 12 that reflects light emitted from the light emitting unit 11 so as to become parallel light, and a parabolic reflector 12 And a transparent protective plate 13 provided in contact with and covering the front edge of. The parabolic reflector 12 has a shape obtained by rotating a parabola as the name suggests, but the liquid crystal panel 2 is formed in a square shape, and the required light irradiation surface shape is a square shape. Therefore, in the vicinity of the front edge of the parabolic reflector 12, four flat surface portions 12a are formed corresponding to the square shape of the liquid crystal panel 2. A plurality of ventilation holes 12b are formed in one of the flat surface portions 12a.
[0016]
The ventilation through hole 12b allows the high-temperature air inside the light source device 3 to be replaced with the low-temperature air outside the light source device 3, and the temperature rise of the light source device 3 can be suppressed. In addition, since a plurality of ventilation through-holes 12b are provided, each ventilation through-hole is appropriately reduced in size to prevent scattering of rupture pieces in the event that the light emitting unit 11 ruptures. In the experiment, it was appropriate to set the diameter of the ventilation through-hole 12b to about 1.5 mm to 2.0 mm from the viewpoint of ventilation and prevention of rupture fragments. In addition, since the ventilation through-holes 12b are formed in the flat surface portion 12a of the parabolic reflecting mirror 12, it is possible to prevent a problem such as a reduction in light reflection efficiency when provided in a scattered manner over a main region of light reflection.
[0017]
3 and 4 are perspective views showing other examples of the light source device. The light source device 6 includes a light emitting unit 21 formed of a discharge tube such as a metal halide lamp, a parabolic reflecting mirror 22 for reflecting light emitted from the light emitting unit 21 so as to be parallel light, and a parabolic reflecting mirror 22. A transparent protective plate provided in contact with and covering the front edge of the mirror; The parabolic reflector 22 has four flat surfaces near the front edge thereof, and has a notch 22a in one of the flat surfaces (the right portion in the figure). The notch 22a is covered by a scattering prevention plate (made of metal in this embodiment) 24 in which a plurality of ventilation through holes 24a are formed. The scattering prevention plate 24 may be attached to the parabolic reflector 22 with an adhesive or the like, but in this embodiment, the scattering prevention plate 24 is attached to the parabolic reflection mirror 22 as follows. .
[0018]
The scattering prevention plate 24 has a main body portion in which the ventilation through-hole 24a is formed, and arms each extending vertically from the main body portion. The tip of each arm portion is bent to form the locking projection 24b. Has formed. On the other hand, at the upper end of the front edge and the lower end of the front edge of the parabolic reflector 22, a locking recess 22b is formed. By engaging the locking projection 24b with the locking recess 22b, the scattering prevention plate 24 is engaged and mounted on the parabolic reflector 22.
[0019]
The support 25 made of an L-shaped plate has an opening 25a in one plate surface (rising plate surface) for transmitting light emitted from the parabolic reflector 22. On the other plate surface of the support 25, a pair of locking holes 26 are provided at intervals substantially corresponding to the width of the parabolic reflector 22. Further, a locking claw 27 is provided at an upper position (a position above the opening 25a) on one plate surface (a rising plate surface) of the support base 25. The locking claw portion 27 is formed so as to protrude substantially parallel to the other plate surface toward the other plate surface, and has a claw portion on the lower surface side at the tip end. In this embodiment, the support 25, the pair of locking holes 26, and the locking claws 27 are integrally formed by resin molding.
[0020]
The locking claw 27 is positioned to lock the linear elastic member 28, but does not receive the elastic force of the linear elastic member 28, and the elastic force is a parabolic reflecting mirror. 22. The parabolic reflector 22 has a larger diameter toward the leading edge, and when the elastic force of the linear elastic member 28 is applied to the parabolic reflector 22, the linear elastic member 28 shifts toward the smaller diameter side. However, this shifting movement is prevented by the locking claw 27. The linear elastic member 28 has a substantially Ω-shape substantially corresponding to the peripheral shape of the parabolic reflecting mirror 22, and has a bent end portion to be engaged with the pair of locking holes 26. It has a portion 28a. The bent portion 28 a of the linear elastic member 28 is engaged with the locking hole 26, and the upper central portion of the linear elastic member 28 is locked to the locking claw 27, whereby the parabolic reflecting mirror 22 is Is applied a downward elastic force. Since the parabolic reflector 22 has a larger diameter toward the front edge side, the parabolic reflector 22 receives one of the plate surfaces (the rising plate surface) of the support 25 by receiving the downward elastic force. ), And a force for pressing the parabolic reflector 22 against the other plate surface of the support 25 is generated. The parabolic reflector 22 is fixed to the support 25 by these forces.
[0021]
Further, the left and right displacement movement of the parabolic reflector 22 is also prevented by the linear elastic member 28 having a substantially Ω shape. A projecting portion 28b is formed on the linear elastic member 28, and the projecting portion 28b passes over the scattering prevention plate 24. Therefore, even if the scattering prevention plate 24 is provided on the flat surface of the parabolic reflector 22, the elastic force of the linear elastic member 28 is reliably applied to the scattering prevention plate 24, and the scattering prevention plate 24 is It will be firmly held in a state pressed by the reflecting mirror 22.
[0022]
As described above, the configuration shown in FIGS. 3 and 4 uses the scattering prevention plate 24 having the ventilation through-hole 24a. Therefore, when the ventilation through-hole 12b is formed in the parabolic reflector 12 itself shown in FIG. 2 can be exerted in the same manner while solving the technical difficulties described above.
[0023]
Here, in order to obtain the best light emitting state in the light emitting unit 21 (11), it is necessary to maintain the light emitting unit 21 (11) at an optimum temperature, and to avoid insufficient cooling or excessive cooling. However, there are differences in the flow of the cooling air depending on the capacity and the arrangement of the light emitting unit 21 (11) and the cooling fan 5 used in each model, and the optimal size of the ventilation through hole 24a (12b) in each model. The number and arrangement will also be different. In the configuration using the scattering prevention plate 24 having the ventilation through-holes 24a, the number and size of the ventilation through-holes 24a (the maximum value of the size of the hole is desirably determined from the viewpoint of debris scattering prevention) and arrangement are determined. A plurality of different types of anti-scattering plates 24 are prepared, and the anti-scattering plate 24 is appropriately selected in consideration of the performance of the cooling fan 5 while using a common product for the parabolic reflecting mirror 22. Therefore, it is possible to easily realize the best light emitting state in the light emitting unit 21.
[0024]
In addition, since the locking concave portion 22b is formed in the parabolic reflecting mirror 22 and the locking protrusion 24b of the scattering prevention plate 24 is engaged with the locking concave portion 22b, the scattering prevention plate 24 is formed without using a screw or an adhesive. Can be attached to the parabolic reflector 22. In addition, it is possible to reuse the scattering prevention plate 24 when exchanging the light source device. Of course, the present invention is not limited to the engagement between the locking recesses 22b and the locking projections 24b, and other configurations such as a locking projection instead of the locking recess 22b can be employed. In order to cover the notch 22a of the parabolic reflector 22 with the shatterproof plate 24, the shatterproof plate 24 may be mounted on the parabolic reflector 22 or, for example, the shatterproof plate 24. Is attached to the support 25, and the notch 22a is covered with the scattering prevention plate 24 by attaching the parabolic reflector 22 to the support 25.
[0025]
In addition, since the parabolic reflector 22 is fixed to the support 25 by the linear elastic member 28, fixing screws and adhesives can be eliminated, and the linear elastic member 28 is scattered by the elastic force. It is possible to reliably prevent the prevention plate 24 from separating from the parabolic reflector 22. In particular, since the projecting portion 28b is provided on the linear elastic member 28, the scattering prevention plate 24 provided on the flat surface of the parabolic reflector 22 can be reliably pressed.
[0026]
In the above description, the parabolic reflecting mirror 12 (22) is exemplified as the curved reflecting mirror, but may be an elliptical reflecting mirror. Further, the scattering prevention plate 24 is not limited to metal, but may be a heat-resistant resin or the like. Further, the scattering prevention plate 24 is mounted on the right side of the parabolic reflector 22, but if the notch 22a is present on the left side, it may be mounted on the left side as well. When the notch 22a exists, it may be attached to only one of the right and left lateral portions and completely closed, or may be attached to both. When the notch 22a exists at the upper part, the notch 22a may of course be mounted at the upper part. Further, the notch 22a and the ventilation through-hole 12b are formed on the flat surface of the parabolic reflectors 22 and 12 so as to prevent the reduction of the light reflection efficiency as much as possible. is not. Further, the shape of the ventilation through hole is circular, but may be other shapes such as a square. Further, although the transparent protective plate 23 is mounted on the parabolic reflector 22, a structure in which the transparent protective plate 23 is mounted on the support 25 may be adopted. Further, the light source device is used for a liquid crystal projector, but can be used for a projection type image display device using another light valve.
[0027]
【The invention's effect】
As described above, according to the present invention, the high-temperature air inside the light source device is replaced with the low-temperature air outside the light source device by the ventilation through-hole, and the temperature rise of the light source device can be suppressed. Further, since a plurality of ventilation through-holes are provided, each ventilation through-hole can be made appropriately small, and it is possible to prevent scattered pieces of ruptured pieces in the event that the light-emitting portion ruptures.
[0028]
If the notch formed in the curved reflecting mirror is covered with a flat plate member having a plurality of ventilation through holes, it is possible to solve the technical difficulty in forming a plurality of ventilation through holes in the curved reflecting mirror itself. . In addition, by changing the number, size, and the like of the ventilation through holes formed in the flat plate member, the cooling capacity for the light emitting unit can be adjusted, and the best temperature can be secured in the light emitting unit.
[0029]
With a configuration in which the flat member is engaged with the curved reflecting mirror, the flat member can be mounted on the curved reflecting mirror without using a screw, an adhesive, or the like. Further, the flat plate member can be reused when exchanging the light source device.
[0030]
If the configuration is such that the curved reflecting mirror is mounted on the supporting base using a linear elastic member, the curved reflecting mirror can be fixed to the supporting base without using screws or adhesives, and the flat plate member is pressed against the curved reflecting mirror. Therefore, in particular, in a mode in which the flat plate member is engaged with the curved reflecting mirror, the separation of the flat plate member can be reliably prevented.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a schematic configuration of a liquid crystal projector according to an embodiment of the present invention.
FIG. 2 is an enlarged view of the light source device shown in FIG.
FIG. 3 is a perspective view of a light source device according to the embodiment of the present invention.
FIG. 4 is an exploded perspective view of the light source device according to the embodiment of the present invention.
FIG. 5 is a cross-sectional view showing a conventional light source device.
FIG. 6 is a cross-sectional view showing a conventional light source device (double tube structure).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Liquid crystal projector 2 Liquid crystal panel 3 Light source device 4 Projection lens 5 Cooling fan device 11, 21 Light emitting part 12, 22 Parabolic reflection mirror 13, 23 Transparent protective plate 12b, 24a Vent through hole 24a Vent through hole 25 Support base 26 Stop hole 27 Locking claw 28 Linear elastic member

Claims (2)

発光部と、前記発光部から出射された光を反射する曲面反射鏡と、前記曲面反射鏡の開口側を覆うように設けられた透明保護板とを備えた光源装置において、
前記曲面反射鏡の前縁近傍に切欠が形成され、複数の通気貫通孔を有して前記切欠を覆うように設けられた平板部材と、
L字状板の一方の板面に前記曲面反射鏡からの出射光を透過させるための開口を有した支持台と、
前記支持台の他方の板面に設けられた一対の係止穴部と、
前記支持台の一方の板面に設けられた係止爪部と、
前記一対の係止穴部に係合し且つ前記係止爪部にて係止されることで前記曲面反射鏡を支持台に固定すると共に前記平板部材を前記曲面反射鏡に圧接する線状弾性部材と、
を備えたことを特徴とする光源装置。
In a light source device including a light-emitting unit, a curved reflecting mirror that reflects light emitted from the light-emitting unit, and a transparent protective plate provided to cover an opening side of the curved reflecting mirror,
A notch is formed near the front edge of the curved reflecting mirror, and a flat plate member having a plurality of ventilation through holes and provided so as to cover the notch,
A support base having an opening for transmitting light emitted from the curved reflecting mirror on one plate surface of the L-shaped plate,
A pair of locking holes provided on the other plate surface of the support base,
A locking claw portion provided on one plate surface of the support base,
The linear elastic member engages with the pair of locking holes and is locked by the locking claw portions, thereby fixing the curved reflecting mirror to the support table and pressing the flat plate member against the curved reflecting mirror. Components,
A light source device comprising:
請求項1に記載の光源装置と、該光源装置から出射された光をライトバルブに導く光学系と、前記ライトバルブを経た光を投写する投写レンズと、前記光源装置の近傍に設けられた冷却ファン装置と、を備えたことを特徴とする投写型映像表示装置。2. The light source device according to claim 1, an optical system for guiding light emitted from the light source device to a light valve, a projection lens for projecting the light passing through the light valve, and a cooling unit provided near the light source device. A projection type video display device comprising: a fan device.
JP2000342582A 2000-11-09 2000-11-09 Light source device and projection type video display device having the same Expired - Fee Related JP3557165B2 (en)

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US7052147B2 (en) * 2003-02-20 2006-05-30 Seiko Epson Corporation Light source, and projector provided with the light source
JP2005004131A (en) 2003-06-16 2005-01-06 Seiko Epson Corp Light source device and projector
JP4511275B2 (en) * 2004-01-30 2010-07-28 三洋電機株式会社 Projection display device
JP4584606B2 (en) * 2004-03-16 2010-11-24 株式会社Suwaオプトロニクス Light source device and projector device
JP4225991B2 (en) 2005-07-29 2009-02-18 三洋電機株式会社 Projector device
JP4518084B2 (en) * 2007-02-13 2010-08-04 セイコーエプソン株式会社 Light source device and projector
JP5316173B2 (en) * 2009-04-03 2013-10-16 岩崎電気株式会社 Light source device
JP5182311B2 (en) * 2010-03-23 2013-04-17 セイコーエプソン株式会社 projector
JP5621317B2 (en) * 2010-05-17 2014-11-12 セイコーエプソン株式会社 projector

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